359results about How to "Optimize space" patented technology

The invention belongs to the technical field of catalyst preparation and wastewater treatment, and particularly relates to a method for in-situ extraction of a high-activity monatomic catalyst from MOFs derived metal oxides and application. Preparing an N-coordinated metal organic framework from transition metal salt and an organic ligand through a precipitation method; then pyrolyzing at 300 to 800 DEG C to obtain a metal monatomic catalyst loaded on the metal oxide and the carbon-nitrogen composite carrier; the organic ligand comprises trimesic acid and a nitrogen-containing ligand. According to the catalyst, the carrier effect of metal oxide and carbon is coupled, in-situ regulation of a monatomic metal site coordination environment is realized by introducing a nitrogen-containing ligand, the efficiency of catalyzing and activating persulfate to degrade phenol is effectively improved, and meanwhile, good anti-interference and cyclic utilization characteristics are shown. The catalyst disclosed by the invention is simple in preparation process, excellent in catalytic effect, high in stability, low in requirements on a treatment process and treatment equipment and free of secondary pollution, and has important significance in the field of wastewater treatment.

The invention relates to the technical field of automatic driving, and particularly discloses an automatic driving interpretation text determination method based on a large visual language model, and the method comprises the steps: obtaining a multi-view camera image, a BEV map image and a text query template; video features in the multi-view camera image are extracted, and image features in the BEV map image are extracted; aligning the image features with the video features based on a modal encoder; encoding the text query template, generating a text mark, mapping the aligned image features and video features to a text embedding space based on a shared projector, generating a visual mark, and inputting the visual mark and the text mark into an LLM backbone model; comprehensive three-dimensional dynamic / static situation perception and visual representation unification of a local scene and a global map are realized, the 3D LVLM architecture has excellent three-dimensional space understanding and dynamic time reasoning capabilities, and the accuracy and safety of end-to-end automatic driving are effectively improved.

The invention discloses a double-flow coding landslide automatic identification method based on improved U-Net, and the method achieves the precise extraction of a landslide through the multi-dimensional features of an optical wave band, a spectral index, a terrain index, a texture index and the like. In order to make full use of sequence features after multi-dimensional feature superposition, the encoder of the invention designs two branches, one branch constructs a residual encoding module to extract spatial dimension features, and the other branch constructs a multi-scale ResNet Module (MSRNM) and a long short-term memory (LSTM) to extract sequence dimension features. Designing a fusion module to effectively fuse the spatial dimension features and the sequence dimension features to obtain deep features; and the decoder is provided with an attention gating decoding module (AGDM), so that the expression of deep layer features and shallow layer features is enhanced, and the sensitivity of the model to the landslide is remarkably improved. The constructed double-flow coding landslide identification model has good space and sequence feature learning ability, and can finely identify various landslides.

The invention relates to the technical field of tourist route recommendation, in particular to a tourist route recommendation system and method based on big data. The method comprises the following steps: collecting travel demand data and basic sign information of a user, and performing hierarchical analysis on a demand to obtain master / slave demand data; then, through demand behavior intersection analysis, muscle soreness intensity is simulated in combination with user physical sign data, and the physical degeneration rate is further estimated; based on the physical decline rate, making a rest strategy, and optimizing distribution and adjustment of tourist routes; and finally, transmitting the adjusted tourist route data to a user terminal. According to the invention, the tourist route recommendation technology is improved, so that the tourist route recommendation technology is more perfect.

The invention belongs to the technical field of biomedical materials, and particularly relates to an anti-inflammatory nano drug delivery system containing a guanidyl structure as well as a preparation method and application of the anti-inflammatory nano drug delivery system, the anti-inflammatory nano drug delivery system is B (at) COFDT-R obtained by taking COFDT as a carrier, loading a drug and then wrapping the drug with an erythrocyte membrane, and the COFDT is obtained by taking DG and TP as raw materials in a reaction of mesitylene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene and carrying out a high-temperature microwave reaction in a 1, 4-dioxane / acetic acid system. The anti-inflammatory nano drug delivery system disclosed by the invention takes a covalent organic framework material as a carrier platform, and integrates the babarid into a COFDT cavity, so that neuronal cells are protected by inhibiting neuroinflammation and pyroptosis of neurons after subarachnoid hemorrhage.

The invention discloses a cargo loading planning method and system, and the method comprises the steps: collecting the information of commodities arriving at an import and export port, and determining the parameter information of a to-be-detected commodity for commodity detection and the overall loading value information; collecting container information and available truck information, and determining current available loading information; based on the to-be-tested commodity parameter information, the overall loading numerical value information and the current available loading information, carrying out cargo simulation planning, placing and stacking and planning cost optimization calculation to obtain a boxing planning result and loading planning cost of the to-be-boxed cargo; generating a loading instruction according to the boxing planning result of the to-be-boxed goods; in the loading process, real-time loading state information is obtained; comparing with a preset loading standard to obtain a loading difference value; if the loading difference value is out of the difference threshold range, triggering a loading adjustment instruction, and adjusting the boxing planning result according to the loading adjustment instruction; according to the invention, the loading of goods is improved, and the space loss of container loading is reduced.

The invention discloses a power distribution network equipment vulnerability assessment method in an extreme scene and related equipment, and belongs to the technical field of power equipment disaster influence assessment, and the method comprises the steps: constructing a grid water accumulation model, and calculating the water accumulation height of each grid based on the grid water accumulation model and a rainfall center position; calculating the fault probability of the distribution transformer and the line based on the ponding height and the environmental factor; carrying out fault sampling based on the fault probability of the distribution transformer and the line, and determining which components may have faults; and outputting the fault component list and the fault probability. Through ponding dynamic simulation and equipment failure probability calculation, the accuracy of vulnerability evaluation of the power system is improved.

The invention provides a wind, light, fire and nuclear storage integrated scheduling architecture based on a complex and uncertain environment of a cold region power grid, and relates to the technical field of power grid system processing, the architecture comprises a data acquisition and monitoring layer, an analysis and decision layer, a control execution layer and an evaluation and optimization layer, the anti-freezing and deicing technology of the power transmission line effectively improves the reliability of equipment in severe environments such as low temperature and ice and snow, guarantees the stability of power transmission of a power grid, reduces equipment faults and power failure accidents caused by cold environment factors, enhances the anti-risk capability of the whole power grid, and improves the safety of the whole power grid. According to the method, characteristics and complementary relations of multiple energy sources of wind, light, fire and nuclear storage are comprehensively considered, peak regulation and frequency modulation analysis and decision making and integrated regulation and control analysis and decision making are carried out, and by constructing a reasonable operation scene and a scheduling model, optimal configuration and cooperative operation of power generation resources can be achieved under different operation conditions.

The invention discloses preparation of a layered mesoporous Pd-Cu nano-catalyst and a method for preparing glycollic acid from PET hydrolysate through electro-oxidation under environmental conditions, and belongs to the technical field of catalysts. The preparation method comprises the following steps: dissolving CTAB (Cetyltrimethyl Ammonium Bromide) serving as a surfactant in a cosolvent of water and TMB (Tetramethylbenzidine), sequentially adding NH4PdCl4 and Cu (NO3) 2.3 H2O serving as metal precursors into a reaction solution, and finally synthesizing the layered mesoporous Pd-Cu by virtue of a reduction effect of sodium borohydride and an in-situ nucleation and adhesion method. Continuous electro-catalysis is carried out in a pulse mode, selective desorption of GA is dynamically accelerated, and new active sites of a metal catalyst are exposed. The electric pulse catalysis can promote the desorption of the product, prevent poisoning, and further improve the stability and selectivity of the catalyst. The method shows excellent glycollic acid Faraday efficiency, high generation rate and excellent cycle stability under a wide potential window, 20 times of electro-catalysis PET upgrading cycles are achieved, and upgrading utilization of PET waste and efficient generation of glycollic acid are achieved.

The invention discloses a vertical labeling machine with a continuous bottle discharging structure, and relates to the technical field of labeling machines, the vertical labeling machine comprises a main body frame and an adsorption plate, a labeling assembly used for discharging labels is arranged above the main body frame, and the labeling assembly comprises a second servo motor, a first reel, a third servo motor, a second reel and an abutting plate; a second servo motor is arranged below the main body frame, a first reel is installed at the output end of the second servo motor, a third servo motor is arranged below the second servo motor, a second reel is installed at the output end of the third servo motor, an abutting plate is arranged outside the second reel, and the first servo motor is arranged in the middle of one side of the main body frame. According to the vertical labeling machine with the continuous bottle discharging structure, through the design of the auxiliary assembly, labeled bottles can make contact with an auxiliary shaft and a built-in shaft in the rotating process of the built-in frame, the bottles rotate in a rolling mode in the rotating process of the built-in frame, labels attached to the surfaces of the bottles can be fixed, the labels are prevented from falling off, and the reinforcing effect is achieved.

The invention discloses an Att-TS-UKAN rainfall deviation correction method based on conditional dynamic region sampling. The Att-TS-UKAN rainfall deviation correction method comprises the following steps: (1) acquiring global rainfall forecast, satellite data and related meteorological factor data and carrying out preprocessing; (2) constructing a deep learning model of Att-UKAN; comprising a convolution block, an attention module and a self-attention KAN module; (3) designing a weighted mean square error and differentiable weather TS score based on sample data distribution; (4) training the model by using global rainfall forecast data, related factors and rainfall satellite data through a conditional dynamic region sampling data enhancement technology; (5) performing deviation correction on the rainfall forecast data of the target area by using the optimized model to generate a more accurate rainfall forecast result; according to the invention, the spatial distribution and magnitude prediction of rainfall forecast are optimized.

The invention mainly relates to the technical field of high-performance ceramic filler nano titanium dioxide, and discloses a preparation method of high-dispersion nano titanium dioxide, which comprises the following steps: slowly dropwise adding a pretreated titanium source into a mixed solvent to prepare a titanium source solution; the preparation method comprises the following steps: adding water and a mixed inhibitor into a reaction kettle, uniformly stirring, slowly dropwise adding the prepared titanium source solution into the reaction kettle, and continuously stirring in the dropwise adding process; cooling the product to room temperature, adding a dispersing agent, aging for a period of time, and slowly adding nano silicon dioxide sol; washing the aged product, and then carrying out vacuum drying treatment; and calcining the dried product at 300-350 DEG C for 1-1.5 hours, then heating to 480-550 DEG C, calcining for 2-2.5 hours, and controlling the heating rate to be 1.5-2 DEG C / min, thereby obtaining the nano titanium dioxide product with uniform granularity and high dispersity after calcining. According to the invention, through optimization of the preparation process, the particle size of the nano titanium dioxide is in a small range, and good particle size uniformity and dispersibility are still kept.

The invention discloses a wetland extraction method based on a neural network. The wetland extraction method comprises the following steps: step 1, acquiring data; the acquisition time interval of the optical remote sensing image data and the acquisition time interval of the radar remote sensing image data have an overlapping part, the overlapping duration is between 30 days and 90 days, and the overlapping duration is comprehensively determined according to the wetland vegetation growth cycle and the hydrological change cycle; the multi-source feature information of the wetland in the key period is reflected by the data; preprocessing operation is carried out on collected original remote sensing image data, and the error rate of radiation correction is strictly controlled within + / -3%. Compared with a traditional artificial remote sensing image interpretation wetland extraction mode, the neural network-based wetland extraction method has the advantages that the processing efficiency is greatly improved, large-scale multi-source remote sensing image data can be quickly processed, and the time and labor cost required by wetland information extraction is reduced.

The utility model provides a carrier tape feeder material film recovery mechanism, which comprises a guide module, a material film recovery module and a material film recovery module, and the film collecting module is arranged below the guide module and is used for dragging and recycling the material film. According to the recovery mechanism, the trend of the material film is accurately changed through the guide module, the problem that the material film is disorderly drooped and randomly stacked after a traditional carrier tape feeder is stripped is effectively solved, and the material film can be orderly pulled and recovered; due to the design of the triangular reversing mechanism, stable transition of a material film in the steering process is guaranteed, deviation of the material film in the conveying process can be prevented through matched use of a film pressing rod and a limiting block, and the operation stability of the whole system is improved; through the design of the roller driven by the motor and the pressing assembly, it is ensured that the material film is clamped by uniform and adjustable pressure from the upper side and the lower side in the recycling process, continuous and stable traction is facilitated, the pressure can be automatically adjusted according to the thickness change of the material film, and therefore the compatibility and the processing efficiency of the material films of different specifications are improved.

The invention relates to a settling tank, in particular to a rubber additive production wastewater settling tank with a movable scraper, which comprises a settling tank, and two sides of the settling tank are communicated with drain pipes; wherein a hydraulic rod is arranged in the center of the bottom end of the settling tank, a driving assembly is arranged on the hydraulic rod, a plurality of threaded lead screws are evenly arranged on the driving assembly, a mounting plate is arranged at the ends, away from the driving assembly, of the threaded lead screws, a reciprocating assembly is arranged in the mounting plate, and the driving assembly drives the reciprocating assembly to do linear reciprocating motion through the threaded lead screws; a plurality of first mud scraping assemblies are arranged on the mounting plate, and a plurality of second mud scraping assemblies are arranged at the bottom end of the mounting plate. According to the settling tank inner wall cleaning device, the first mud scraping assembly is arranged to loosen an adhesion layer through impact, an arc-shaped plate of the second mud scraping assembly and a third scraping plate on the arc-shaped plate scrape loose sediments, the first mud scraping assembly and the second mud scraping assembly work cooperatively, the sediments are scraped after being impacted, comprehensive cleaning of the inner wall of the settling tank is achieved, and the cleaning efficiency and effect are improved.

The utility model discloses a power battery heat management unit assembly which comprises a shell, a circulating water pump, a heat exchanger, a compressor, a condenser core body and a liquid storage drying filter are installed in the shell, an expansion water tank is further fixed outside the shell, and a circulating water inlet pipeline and a circulating water outlet pipeline are fixed in the shell. A water inlet connecting port of the circulating water inlet pipeline and a water outlet connecting port of the circulating water outlet pipeline are fixed on the shell and are exposed; an outlet of the circulating water pump is communicated with one end of a water flowing channel of the heat exchanger, and the other end of the water flowing channel is communicated with the circulating water outlet pipeline; the circulating water inlet pipeline is provided with a water supplementing opening, and the water outlet of the expansion water tank is communicated with the water supplementing opening through a pipeline. The unit assembly can simplify the work of assembly connection, and is simpler and more convenient to install.

A humanoid robot finger transmission system belongs to the technical field of manipulators and comprises a palm part and finger parts, each finger part is provided with a transmission system, each transmission system comprises a driving mechanism and a connecting rod mechanism, and each driving mechanism is a miniature double-buckle pushing chain device arranged on the side, close to the palm back, of the palm part. A first installation space is formed in the palm part, close to one side of the palm center, of the driving mechanism, the connecting rod mechanism comprises a first connecting rod connected between the middle knuckles and the far-end knuckles and a second connecting rod connected between the near-end knuckles and the middle knuckles, and a driving rod assembly is connected between the second connecting rod and the output end of the miniature double-buckle pushing chain device. And a second mounting space is formed in the finger part on the outer sides of the connecting rod I and the connecting rod II. The miniature double-buckle pushing chain device is used as a driving mechanism of each finger part, so that the cost is reduced, the internal mounting space of the manipulator can be greatly expanded, and the manipulator can realize function upgrading by mounting more sensor parts.

The invention discloses a chiral amine ligand-based room-temperature continuous-wave perovskite laser and a preparation method thereof, a quasi-two-dimensional perovskite film with ordered phase distribution, strong crystal orientation and low lattice distortion degree is obtained by using a chiral amine ligand, and these characteristics endow the film with an excellent four-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system and a high-energy-level material structural system. The carrier pumping efficiency is enhanced, population inversion is facilitated, and the laser threshold is reduced; the energy transfer efficiency from a low two-dimensional phase (n = 1) to a high two-dimensional phase (ngt; 5) is enhanced; the number and strength of hydrogen bonds between the perovskite octahedral frame and the perovskite octahedral frame are increased, and the electroacoustic coupling effect is effectively inhibited. The prepared chiral quasi-two-dimensional perovskite serves as a gain medium and is combined with an optical resonant cavity to prepare a laser, room-temperature low-threshold continuous wave or pulse laser emission can be realized under various coherent light source pumps, the threshold is 1-3 orders of magnitude lower than that of a traditional semiconductor laser, and the optimized threshold can reach 1.57 W / cm < 2 >.

The invention relates to a lift-off auxiliary system which comprises a traction body, a balance umbrella and an auxiliary mechanism. The traction body is used for providing initial lift force for the high-altitude acting module, and the initial lift force guides the high-altitude acting module to rise to a first altitude; the balance umbrella is connected with the traction body, and after the balance umbrella is opened windward, the balance umbrella and the traction body jointly continue to guide the high-altitude acting module to a second altitude for acting; the auxiliary mechanism is respectively connected with the balance parachute and the high-altitude acting module, and comprises a traction rope and a control piece for controlling the release and recovery of the traction rope; when the wind speed at the first altitude is not enough to open the balance umbrella, the control piece releases the traction rope, and the traction body continues to rise until the wind speed is enough to open the balance umbrella. According to the scheme, through the auxiliary mechanism, the traction body can continuously drive the balance umbrella to the height at which the wind speed is enough to open the balance umbrella, hovering of the air acting module is avoided, and it is ensured that the umbrella-ladder combined type high-altitude wind energy acting module can still smoothly lift off to do work when the low-altitude wind speed is relatively low.

The invention belongs to the technical field of biology, and discloses a controllable multi-channel three-dimensional dynamic culture system for simulating a cell mechanical microenvironment, the controllable multi-channel three-dimensional dynamic culture system comprises a driving platform, a flexible driver and a cell culture box, the flexible driver is provided with a planar substrate and an outer wall provided with a periodic protrusion structure, and is provided with a hollow structure serving as an air chamber; one end is connected with the air path module through an air hole channel, and the other end is sealed; a groove is also formed in the outer surface of the planar substrate and is used for accommodating cells to be cultured; the flexible driver air chamber can be pressurized or depressurized, so that the bending degree is enhanced or reduced according to the preset frequency, and a mechanical microenvironment is generated. The three-dimensional dynamic culture system constructed by the invention can simulate a cell mechanical microenvironment, realizes dynamic culture of cells, and promotes cell proliferation and expression of specific proteins. In addition, the system can be conveniently designed into multi-channel culture, and has a very good practical application prospect.

The invention provides an equipment device for solving lithium battery slurry bubbles, the equipment device comprises a feeding box, a coating scraper box and a feeding pump, one side of the top of the feeding box is provided with a feeding pipe, the feeding pump is installed on one side of the bottom of the feeding box, and the feeding pipe is installed between the input end of the feeding pump and the bottom of the feeding box; a feeding pump is installed on one side of the top of the feeding box, a discharging pipe is installed at the output end of the feeding pump, the other end of the discharging pipe is connected with the coating scraper box, a backflow box is arranged on the other side of the top of the feeding box, a buffering box is arranged on one side of the top of the backflow box, and a conveying pipe is installed at the outlet end of the bottom of the buffering box. Under the cooperative action of the backflow box, the spraying assembly, the buffer box and the rotating assembly, bubbles can be rapidly eliminated in the actual production process, so that the process window is improved, the advantages of speed increase, slurry utilization rate improvement, stable product quality and the like are achieved, the space is improved through large-span improvement, and the production advantage of low cost is achieved.

The invention relates to the field of weather inspection and correction, and provides a rainfall target identification and correction method based on an adaptive threshold value in order to improve the overall precision and reliability of forecast inspection, and the method comprises the steps: dynamically adjusting the threshold value according to the distribution of the adaptive threshold value, and capturing rainfall systems with different intensities and scales. Meanwhile, the area ratio is used as an index for objectively quantifying whether target object recognition is reasonable or not, after different target pairs are recognized, a forecasting field is corrected through error information of the target pairs, the intensity and spatial distribution of rainfall forecasting are optimized, the overall precision and reliability of forecasting inspection can be improved, and the forecasting efficiency is improved. And the forecasting model can adapt to the change of a complex weather system.

The invention relates to the technical field of land development, and particularly discloses a GIS-based land reclamation development evaluation method and related equipment, and the GIS-based land reclamation development evaluation method comprises the steps: obtaining GIS information of a target region; splitting and recombining the GIS current situation data and the GIS planning data to obtain a servicing data set and a planning data set; according to the servicing data set and the unit servicing cost of different land servicing modes, obtaining the total servicing cost, and according to the planning data set, obtaining the development input cost and a prediction income curve about time; obtaining a profit and loss result of the target age limit by integrating the total servicing cost, the development input cost and the prediction profit curve so as to carry out development evaluation; according to the method, the problems of low efficiency, low precision, incomplete consideration factors and the like of a traditional method are effectively solved, and a more reliable and more scientific basis is provided for land reclamation development decisions.

The invention relates to an enterprise project informatization data processing method, device and system and a storage medium. The method comprises the steps of obtaining enterprise project operation data, enterprise project target information and market project constraint conditions corresponding to a target enterprise; determining each network analysis model and each mathematical analysis model according to the data type and data complexity information of the enterprise project operation data; performing series market dynamic analysis on the enterprise project operation data by using each network analysis model to obtain network model analysis data; performing series market dynamic analysis on the enterprise project operation data by using each mathematical analysis model to obtain mathematical model analysis data; and performing resource utilization analysis according to the network model analysis data and the mathematical model analysis data by taking the target information of each enterprise project and the constraint condition of each market project as limitation information to obtain an enterprise operation analysis result. By adopting the method, the enterprise project informatization data processing efficiency can be improved.

The invention provides a cigar coat tobacco leaf cultivation method, and belongs to the technical field of tobacco cultivation. The cultivation method comprises the following steps that ridging and drip irrigation cultivation are conducted, ridge moistening and moisture increasing are conducted before tobacco seedlings are transplanted, the drip irrigation flow speed is controlled to be 1.0 L / h to 1.5 L / h, and the drip irrigation duration is 3 h to 5 h; shading is started after the tobacco plants enter the resettling stage, and the light transmittance of a shading net is 60%-80%; spraying is carried out when the temperature exceeds 33 DEG C from the vigorous growing period of the tobacco plants to the end of harvesting, and the water spraying amount is 800-1500 kg / mu. By means of the cultivation method, the appearance quality, such as color uniformity and leaf surface tissue integrity, and the physical characteristics, such as leaf thickness, elasticity and the like, of the cigar coating tobacco leaves can be remarkably improved. The high-quality cigar coating can improve the overall quality of cigars, enhance the competitiveness of cigars in the market, meet the requirements of consumers for high-quality cigars and further improve the additional value of cigar products.

The invention discloses a soil nutrient inversion method based on multi-source physical constraint and a multi-scale attention network, and aims to solve the problems that a soil nutrient inversion method based on remote sensing lacks enough truth value marking data and does not consider spatial autocorrelation of soil nutrients in geographic space and a physical imaging rule influenced by a microenvironment and an earth surface structure. Therefore, the problems of deviation of the inversion value and lack of spatial texture constraint and geographical continuity of the soil nutrient content distribution map generated by inversion are solved. According to the method, the collaborative Kriging trend and soil microenvironment and earth surface structure characteristics are introduced as physical constraints, a sample expansion confrontation model is constructed, sample expansion is performed by a scientific method integrating a physical environment and a spatial law, the physical imaging law of soil nutrients is fully considered, and the accuracy of the sample expansion confrontation model is improved. In combination with a designed multi-scale residual attention inversion model for extracting key information from a spectrum, the generated soil nutrient content distribution map is relatively excellent in spatial texture constraint and geographical continuity.

The embodiment of the invention provides a gene screening method and device and a gene clustering method and device, and belongs to the technical field of gene sequencing. The gene screening method comprises the following steps: acquiring initial distribution data of multiple types of genes in a target slice from spatial transcription data of the target slice; constructing corresponding target distribution data based on the initial distribution data of each type of genes, wherein the target distribution data indicates that the corresponding type of genes are uniformly distributed in a two-dimensional space; calculating the diffusion degree of each type of genes according to the initial distribution data and the target distribution data; and screening the multiple types of genes based on the diffusion degree of each type of genes to obtain a target type of genes. According to the embodiment of the invention, genes can be screened, so that the quality of gene data in transcripts can be improved.

The invention discloses a continuous wave three-dimensional chiral perovskite laser and a preparation method thereof, and a high-quality perovskite gain medium is prepared by adopting a simple, easy-to-operate and low-cost method for post-processing perovskite crystals through a chiral solution. According to the present invention, the chiral perovskite crystal surface defect is passivated while the stable strong covalent bond or ionic bond can be formed through the intramolecular acting force, the chiral spinning electron in the chiral material is conducted to the achiral perovskite crystal so as to achieve the circular polarization luminescence, and the asymmetric factor reaches 8.5 * 10 <-3 > (-8 * 10 <-3 >); the post-processed perovskite crystal can generate stimulated radiation amplification under the excitation of femtosecond laser, the threshold value is 12.73 mu J / cm < 2 >, the light-emitting asymmetric factor is amplified to 0.054 near the threshold value, laser emission can be formed under the excitation of continuous wave laser under the condition that a high-quality optical microcavity is combined, and the multimode laser threshold value is 0.6 W / cm < 2 >.

The invention discloses a large-site impedance mud type polycarboxylic acid water reducer, which is a segmented copolymer formed by an unsaturated polyoxyethylene ether monomer, a tristyrylphenol polyoxyethylene ether phosphate monomer and an unsaturated carboxylic acid monomer. On the basis of a traditional polycarboxylate superplasticizer structure, tristyrylphenol polyoxyethylene ether phosphate, a polycarboxylate superplasticizer with a molecular structure containing a polyoxyethylene ether long chain, a large steric hindrance group with a plurality of benzene ring structures and a phosphate group with a mud-resistant function are further introduced; the water reducing agent can reduce the adsorption of soil to the water reducing agent under the condition of low mixing amount, ensures a better water reducing effect, and is suitable for popularization and application.

The embodiment of the invention provides a tunable resonant cavity and a laser, and the tunable resonant cavity comprises a micro-ring which comprises an arc waveguide part and a straight waveguide part; a heat module is arranged on the straight waveguide part and is used for adjusting the refractive index of the micro-ring; the thermal isolation grooves are provided with Bragg grating structures and are located on the two sides of the thermal module; and the bent waveguide comprises a first bent waveguide and a second bent waveguide, and the first bent waveguide and the arc waveguide part have a first coupling area and a second coupling area respectively.